NAICS 561612:
Security Guards and Patrol Services
This U.S. industry comprises establishments primarily engaged in providing guard and patrol services, such as bodyguard, guard dog, and parking security services.
Guard servicesGuard dog servicesBody guard services+5 examples
Private police servicesSecurity guard servicesSecurity patrol servicesParking security servicesProtective guard services
Matching SIC code: 7381 Detective, Guard, and Armored Car Services
Where it sits
- 56Administrative and Support and Waste Management and Remediation ServicesSector
- 561Administrative and Support ServicesSubsector
- 5616Investigation and Security ServicesIndustry group
- 56161Investigation, Guard, and Armored Car ServicesNAICS industry
- 561612Security Guards and Patrol ServicesNational industry
Largest companies with NAICS 561612
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  Allied Universalaus.com | Irvine, US | 108K |
| 2 |  Securitas Security Services USA, Inc.securitasinc.com | Parsippany-Troy Hills, US | 45K |
| 3 |  Constellisconstellis.com | Herndon, US | 6.9K |
| 4 |  Inter-Con Securityicsecurity.com | Pasadena, US | 5.4K |
| 5 |  CSC - Contemporary Services Corporationcsc-usa.com | Los Angeles, US | 5.4K |
| 6 |  U.S. Security Associates, Inc.ussecurityassociates.com | Roswell, US | 4.6K |
| 7 |  Andy Frain Servicesandyfrain.com | Aurora, US | 3.3K |
| 8 |  Whelan Securitywhelansecurity.com | St. Louis, US | 3.2K |
| 9 |  HSShss-us.com | Denver, US | 2.7K |
| 10 |  Security Industry Specialistssis.us | Culver City, US | 2.7K |
Not this code?
Similar activities the Census classifies elsewhere.
- 56162Security Systems ServicesEstablishments primarily engaged in selling, installing, monitoring, and maintaining security systems and devices, such as burglar and fire alarms and locking devices,
- 922120Police ProtectionGovernment establishments primarily engaged in criminal and civil law enforcement, police, traffic safety, and similar activities related to the enforcement of law
Questions about NAICS 561612
Which businesses use NAICS 561612?
Guard services, guard dog services and body guard services, and similar businesses in the Administrative and Support and Waste Management and Remediation Services sector. This U.S.
What SIC code matches NAICS 561612?
SIC 7381, Detective, Guard, and Armored Car Services, from the US Census Bureau's concordance between the two systems.
How many companies have NAICS 561612?
9,100 companies with a website carry NAICS 561612 as their primary code in Crustdata's data, worldwide.
Find any company's NAICS codeType a company name or website and get its codes with their titles.
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Sign up freeCode titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.